Order WP_query by last word in title

Hi all,

I’m developing a site with several custom post types and each of those with several custom taxonomies. One of the post types is people, and I would like to use the title to display the persons name. My issue is that I would like to be displaying alphabetically by the last word in the title rather then the first. I’ve searched the forums and web for anyone who has found a good solution for this and so far I’m not seeing much of use. Has anyone run into this and found a good workaround?

Here’s what I’m starting with:

<?php $my_query = new WP_Query('post_type=people&posts_per_page=-1&groups=directors&orderby=title&order=asc');
while ($my_query->have_posts()) : $my_query->the_post(); ?>

<img src="<?php echo get_post_meta($post->ID, 'board_member_photo', true); ?>" />
<div>
<h2><?php the_title(); ?></h2>
<p><?php echo get_post_meta($post->ID, 'company_title', true); ?></p>
<?php the_content(__('Read more'));?>
</div>	

<?php endwhile; ?>
<?php wp_reset_query(); ?>